| Powerful Films Ltd | Arts & recreation | 2018 |
| PPD1 Limited | Construction | 2014 |
| PPD2 Limited | Real estate | 2015 |
| PPD3 Limited | Real estate | 2015 |
| Prestige Worldwide Investments Ltd | Construction | 2024 |
| Prime Venue Limited | Administrative & support | 2006 |
| Prize Platforms Limited | Manufacturing | 2024 |
| Pro Sports KIT UK Limited | Wholesale & retail | 2015 |
| Puresmile Borehamwood Limited | Health & social care | 2017 |
| Puresmile BOW Ltd | Health & social care | 2026 |
| Puresmile Earley Ltd | Health & social care | 2010 |
| Puresmile Holdings Ltd | Financial services | 2026 |
| Puresmile Oxford Ltd | Health & social care | 2021 |
| Puresmile Reading Ltd | Health & social care | 2011 |
| Purple Star Slough Ltd | Health & social care | 2023 |
| Pyar Health Care Ltd | Health & social care | 2024 |
| Pynchester Electrical Contractors Limited | Manufacturing | 2012 |
| Qattan Beauty Limited | Other services | 2018 |
| Qattan Hairdressing Ltd | Other services | 2020 |
| Qattan Limited | Other services | 2012 |
| Quarrendon Ltd | Extraterritorial | 2014 |
| Randall Legal Services Ltd | Professional & scientific | 2022 |
| Rapture Developments Limited | Construction | 2023 |
| Rectory SSB Ltd | Administrative & support | 2018 |
| Reena Popat Ltd | Extraterritorial | 2016 |
| REN Investments Limited | Financial services | 2022 |
| Rescue Projects Limited | Real estate | 2024 |
| Revolutione Limited | Arts & recreation | 2024 |
| Revops Ninjas Ltd | Professional & scientific | 2024 |
| Rice Capital Limited | Hospitality | 2016 |
| Ricepark Racing Limited | Arts & recreation | 2018 |
| Rickmansworth Orthodontic Practice Limited | Health & social care | 2010 |
| Riddlesdown SSB Ltd | Administrative & support | 2018 |
| Ridley Electronics Limited | Manufacturing | 1982 |
| RK UK Property Group Limited | Real estate | 2024 |
| RMM Investors LLP | | 2016 |
| Rock on Styles Ltd | Wholesale & retail | 2014 |
| Rosegold Property Ltd | Real estate | 2020 |
| RS Heera Productions Limited | Information & communication | 2026 |
| RS Legal Consultants Limited | Professional & scientific | 2021 |
| RSD Projects Limited | Professional & scientific | 2011 |
| Rubisa UK Limited | Transport & logistics | 2014 |
| Rugby Fitted Wardrobes Ltd | Manufacturing | 2023 |
| Ruislip Frameworks Ltd | Administrative & support | 2003 |
| Ruvo Group Ltd | Construction | 2025 |
| S Heath Consultants Limited | Professional & scientific | 2018 |
| Sable DOR Catering Ltd | Hospitality | 2011 |
| Sable DOR Property Ltd | Financial services | 2025 |
| Saipo Limited | Real estate | 2024 |
| Samia Kamar Limited | Wholesale & retail | 1998 |
| Satoto Ltd | Real estate | 2020 |
| Satvir 1 Ltd | Real estate | 2018 |
| SC London Consultancy Limited | Professional & scientific | 2023 |
| Scale UP Recruitment Limited | Administrative & support | 2019 |
| Scalecrest Limited | Real estate | 2006 |
| SDP Construction Limited | Construction | 2020 |
| Sean Stubbs Scenery Ltd | Manufacturing | 2022 |
| Secure World Security Limited | Administrative & support | 2010 |
| Sefton Street Management Limited | Real estate | 2021 |
| Sensing Precision Limited | Manufacturing | 2011 |
| Serve and Return LLP | | 2024 |
| Shacklady Films Limited | Information & communication | 2014 |
| Sharville Investments Ltd | Financial services | 2018 |
| Shearwater Chemicals Ltd | Professional & scientific | 2023 |
| Shopalex Limited | Other services | 2022 |
| Signature 1 Construction Ltd | Construction | 2019 |
| Signature 1 Properties Ltd | Real estate | 2023 |
| Silver Glass Company Limited | Construction | 2000 |
| Silvercity Properties Limited | Real estate | 2001 |
| Smsb Limited | Real estate | 2024 |
| SO Salon Limited | Other services | 2023 |
| SO UK Properties Ltd | Real estate | 2023 |
| Solarbase Limited | Real estate | 2021 |
| Solasta Limited | Administrative & support | 2015 |
| Solent Charters Limited | Extraterritorial | 2010 |
| Solitaire Property Developments Limited | Construction | 2013 |
| Somethinkdesign Ltd | Professional & scientific | 2016 |
| Soul Capital Partner Limited | Other services | 2014 |
| Sound Construction Limited | Construction | 2019 |
| Southfield Park Freehold Co. Limited | Real estate | 2018 |
| Spread Co UK Limited | Financial services | 2006 |
| ST Columb Minor Preschool Limited | Education | 2016 |
| Star Management and Investments Limited | Real estate | 1995 |
| Station 57 Ltd | Hospitality | 2015 |
| Statutory Solutions Ltd | Administrative & support | 2022 |
| Step Haven Ltd | Wholesale & retail | 2023 |
| Stewart House Orthodontics Limited | Health & social care | 2011 |
| Streatham Tasty Limited | Hospitality | 2024 |
| Supernatural Ltd | Information & communication | 2024 |
| Surrey Timepieces Ltd. | Wholesale & retail | 2024 |
| SW Conferences Limited | Administrative & support | 2020 |
| Swap Trading Limited | Wholesale & retail | 2014 |
| Symitry Limited | Administrative & support | 2003 |
| T & Y Enterprise Ltd | Hospitality | 2004 |
| T.A.D. Assets Ltd | Real estate | 2019 |
| Tash Tastik Media Ltd | Extraterritorial | 2017 |
| Temple & Temple Limited | Professional & scientific | 2021 |
| TGH Services Commercial Upholstery Limited | Other services | 2014 |
| Thamesway Limited | Information & communication | 2005 |
| THE Active Prescription Limited | Arts & recreation | 2017 |